Cometic head gasket question

Does anyone know the actual bore size on a 4.500" , .040" head gasket? The best I can find is cc volume and computing it backwards it comes out exactly 4.500" Seems that may be a little tight with production variances of castings. I figured I would look for a shelf gasket before ordering a custom size. I have an overbore on this block and really can't believe this is all they make as a stocking part. Thanks, Beep

Oops, gasket number cgt-c5464-040

Get a 4.530" gasket, nothing to worrie about.

Cometic will make it any way you want it. So 4.530 is a safe bet. I have 4.530 and 4.560 here. Both were custom made as we added some steam holes as well.

Hey John! how's it going? Engine is looking good
How big?

The 572 is about done.

Thanks guys. I just figured I would see if I was missing something that wasn't special order.

Allen, With the slight bore change it is a 529" now and with the new venolias and head clean up it should be just a touch over 14:1. Should work great with the alcohol set up.
Are you guys chomping at the bit to go racing? Is the car done at holts yet? Beep

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Cometic will make it any way you want it. So 4.530 is a safe bet. I have 4.530 and 4.560 here. Both were custom made as we added some steam holes as well.

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I agree, and any Cometic dealer can get them for you.
Keith Black racing engines stocks MLS gaskets for 4.500 bore blocks and I believe they are 4.560. Give them a call, the last I heard they were $76.50 each.